Re: Strange device init
From: Pierre Ossman (drzeus-list_at_drzeus.cx)
Date: 02/06/05
- Previous message: Herbert Xu: "Re: PROBLEM: 2.6.11-rc2 hangs on bridge shutdown (br0)"
- In reply to: Adam Belay: "Re: Strange device init"
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Date: Sun, 06 Feb 2005 12:40:59 +0100 To: Adam Belay <ambx1@neo.rr.com>
Adam Belay wrote:
>On Sat, Feb 05, 2005 at 06:10:02PM +0100, Pierre Ossman wrote:
>
>
>>I'm having problem with a card reader on a laptop (Acer Aspire 1501).
>>The device doesn't get its resources configured properly.
>>
>>The reader is connected to the LPC bus so there is no standardised way
>>to configure the device. On other laptops the configuration is done via
>>ACPI (_STA & co. in the DSDT). On this laptop these functions don't do a
>>damn thing.
>>In Windows this device gets configured through some other means. It's
>>not in the driver (I've disected it to confirm this). But under Linux
>>the device is left unconfigured.
>>
>>So my question is if anyone has any ideas on how this device gets
>>configured by Windows and possibly how we can get this to work on Linux.
>>
>>The reason this is an issue is that one cannot detect all the quirks of
>>the hardware so a PNP solution is prefered. In those cases the
>>manufacturer has chosen resources that work ok.
>>
>>For some context: I am the maintainer of the driver for this hardware. I
>>have a laptop where the DSDT properly sets up the hardware. The Acer
>>belongs to some of my users but they are not familiar with the kernel so
>>I'm trying to fix this for them.
>>
>>Rgds
>>Pierre
>>
>>
>
>So the device is not listed in the DSDT, or _SRS doesn't work? Does _STA
>succeed? Finally have you checked if PnPBIOS detects the device? Any
>additional information you could provide would be appreciated.
>
>
>
The device is listed in the DSDT but the functions are empty. E.g. _SRS:
Method (_SRS, 1, NotSerialized)
{
}
_PRS and _CRS at least returns the proper resources that should be used.
PNPBIOS cannot be compiled in. This is a x86_64 machine and PNPBIOS is
dependent on ISA. Are there any user-space tools that can do the same
thing? Just to do some testing.
Rgds
Pierre
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- Previous message: Herbert Xu: "Re: PROBLEM: 2.6.11-rc2 hangs on bridge shutdown (br0)"
- In reply to: Adam Belay: "Re: Strange device init"
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